Oxalis dillenii Jacq. (Synonym : Oxalis sanguinolaria Raf.)

Family : Oxalidaceae [Naturalized plant]

Oxalis obtriangulata Maxim. (Synonym : Oxalis japonica Franch. & Sav. var. obtriangulata (Maxim.) Makino)

Family : Oxalidaceae

Oxalis stricta L. (Synonym : Oxalis chinensis Haw. ex G.Don)

Family : Oxalidaceae

Oxybasis glauca (L.) S.Fuentes, Uotila & Borsch (Synonym : Chenopodium glaucum L.)

Family : Chenopodiaceae [Naturalized plant]

Oxyria digyna (L.) Hill (Synonym : Oxyria reniformis Hook.)

Family : Polygonaceae

Oxytropis anertii Nakai ex Kitag. (Synonym : Oxytropis anertii Nakai ex Kitag. var. albiflora Z.J.Zong, X.R.He, J.Liu & J.C.Zhang)

Family : Fabaceae

Oxytropis caerulea (Pall.) DC. (Synonym : Astragalus caeruleus Pall.)

Family : Fabaceae

Oxytropis racemosa Turcz. (Synonym : Oxytropis acutirostrata Ulbr.)

Family : Fabaceae

Oxytropis strobilacea Bunge

Family : Fabaceae

Pachysandra terminalis Siebold & Zucc.

Family : Buxaceae